Any issues with this Circuit/VFD/Motor setup?

F

FRESH_OUTTA_800AD

Joined
Dec 24, 2019
Messages
10
Hey guys,

looking for some personal experiences or insights. I have bought a used 1.5 hp Baldor motor for a 2x72 grinder I’m nearing completion on. I’ve been looking at the KBDA/KBAC 27D VFDs, with a lean towards the KBAC, but I just learned of the problems with VFDs and GFCIs. Fun stuff.

I got a 120v, 20a circuit to my garage, which first feeds a non-GFCI outlet (non code I know, not my doing), then a CFGI outlet for my freezer. The GFCI is definitely downstream of the non-GFCI outlet, I popped the test circuit and only the freezer turned off.

I don’t plant to run the motor hard, or use high accel/dece rates.

My question is do any of you anticipate any issues using this 1.5hp motor with my KBAC-27D (Gen 3 w/supposed GFCI support) in this circuit off the standard outlet? Seems ppl have problems with the GFCI, and the solution is either move the GFCI downstream of the grinder (basically my current wiring setup), or run a dedicated circuit to the grinder (not quite ready to do that yet). I plan to run the VFD just off the standard outlet, upstream of the GFCI.

Maybe in the near future wife and I will come to agreement and spend money to upgrade our electrical situation. I get my 220 in the garage, she gets her hot tub..


Just looking for feedback/feel goods before I dump another $350-400 into this project.
 
Are youplanning on running it on 120 volts?

A 20 amp circuit will run a 120 volt motor if it doesn't get bogged down and cause a current spike. The refrigerator is also taking a bit of current off that 20 amp breaker. You may trip the breaker in the fuse panel occasionally. The GFIC on the refrigerator will not be an issue.

Best solution would be to use a 240 volt circuit if there is one nearby.
 
I'd put the freezer on the circuit by itself and remove the gfi

I'd put in a new 120 20 amp circut for the grinder and some lights

It's not expensive.
 
12345678910 said:
I'd put the freezer on the circuit by itself and remove the gfi

I'd put in a new 120 20 amp circuit for the grinder and some lights

It's not expensive.
Click to expand...

Any idea how much? My main panel is full, so no room for new circuits. I could run the new outlet, but would probably contract the service/panel upgrade. I’d also want a service upgrade in addition to a bigger panel. Would love to have 220 power in the garage..
 
Sounds like you have at least one space with the current service. You could get single space double service breakers and consolidate a couple normal size breakers to free up an extra space. Put a decent size 220 breaker in and feed a sub panel in the garage. Way cheaper than a panel upgrade.
 
FRESH_OUTTA_800AD said:
Any idea how much? My main panel is full, so no room for new circuits. I could run the new outlet, but would probably contract the service/panel upgrade. I’d also want a service upgrade in addition to a bigger panel. Would love to have 220 power in the garage..
Click to expand...

It depends where the panel is.
Is it is the garage.

A service upgrade will be big bucks.
A hot tub will be big bucks.

Just do what you have to do now to do what you need.

As said above, you can do mini split breakers, or subpanels and such.

Quotes are free and the electricians have solutions you didn't know about.
 
I could be wrong as I didn’t dig too deep as I don’t have a lot of time to look into this at the moment, and wanted to chime in. But I don’t think either of these drives will run off 120v as the Manuls state 208/240v signal phase

https://motorsandcontrol.com/files/manuals/kb/9521.pdf

https://motorsandcontrol.com/files/manuals/kb/9543.pdf

And is the motor you picked up a 3-phase because typically most vfd you are running feedinging singal phase or 3-phase input and both will give you a 3-phase output. and it’s good to make sure the motor is inverter rated, as I found out the hard way and burnt out the start windings when I first took a singal phase motor and hooked it up to my vfd for my grinder.

if you post a link to what your looking at and the specs of your motor others/I can make sure ur setup is going to work for you. Nothing worse then spending money just to find out you bought the wrong stuff.
 
well looks like I should have held my tongue and not chimed in so soon haha. Turns out both drives will work on 120v. But I would still double check the motor you picked up is compatible with the drive. And I’m sure the circuit current won’t be a big deal just to give you an idea I took an amp draw on mine even tho mine is wired 240v it only ever draws 1.4amps at its peak. If anything I would foresee it doubling if it were running on 120v

sorry about jumping the gun on my first chime in
 
For what it’s worth, I got everything hooked up today and only changed the appropriate jumpers. Left it on the default setting switching frequency (8k I think), and did some light/moderate grinding at full speed. Had no issues on the standard or GFIC circuit.
 
You must log in or register to reply here.
Back
Top